Schulrechner – calculator you know from school

Schulrechner is a scientific calculator designed to reproduce the experience of using a handheld calculator at school. Its interface is modelled on familiar physical calculators, with mathematical expressions and results displayed in a conventional textbook-style layout.

The application supports complex expressions, implicit multiplication and results displayed as fractions or decimal numbers. Calculations can be stored and reused, while previous expressions can be selected from the input history and edited.

Schulrechner also supports different graphical designs, allowing the appearance of the calculator to be changed without altering its underlying mathematical functionality. These designs use SVG graphics to reproduce the layout and controls of handheld calculators.

The application is built using JavaScript and the math.js library. It is available as a Linux Flatpak, an Android application and a browser-based version. The developer describes it as a work in progress, with some calculator buttons and functionality still being implemented.

This is free and open source software.

Key Features

• Enter complex mathematical expressions using a traditional school calculator interface.
• Display calculation results as fractions or decimal numbers.
• Supports implicit multiplication, such as 5π, without requiring an explicit multiplication operator.
• Store calculation results and reuse them in subsequent expressions.
• Navigate calculation history and edit previously entered equations.
• Switch between different SVG-based calculator designs.
• Uses the math.js library for mathematical evaluation.
• Cross-platform support – runs on Linux, Android and web browsers.

Website: github.com/CardiJey/schulrechner
Support:
Developer: Joris Yidong Scholl
License: GNU General Public License v3.0

Schulrechner is written in JavaScript. Learn JavaScript with our recommended free books and free tutorials.

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